DataGridViewComboBoxColumn vb.net รบกวนด้วยครับช่วงนี้มาบ่อย (มือใหม่ครับ)

Dim a = DataGridViewComboBoxColumn
Dim b = DataGridViewImageColumn
Dim c = DataGridViewTextBoxColumn
Dim d = DataGridViewButtonColumn

Imports System.Windows.Forms
Public Class TextButton
    Inherits UserControl

    Public Event ButtonClick As EventHandler(Of TextButtonEventArgs)
    Public Property myWidth As Integer = 123
    Public Property myHeight As Integer = 456
    Public Property myGirl As String = "หอยใหญ่/หอยงาม/หอยหอม"

    Public NotInheritable Class TextButtonEventArgs : Inherits EventArgs
        Public Text As String
        Public Handled As Boolean

        Sub New(ByVal หอยงาม As String)
            Text = หอยงาม
        End Sub
    End Class
    Private Sub button_Click(sender As Object, e As EventArgs) Handles button.Click
        Dim args As New TextButtonEventArgs(InnerTextBox.Text)
        RaiseEvent ButtonClick(Me, args)
        If args.Handled Then
            InnerTextBox.Text = args.Text
        End If
        InnerTextBox.Focus()
    End Sub
    Public Overrides Property Text() As String
        Get
            Return InnerTextBox.Text
        End Get
        Set(value As String)
            InnerTextBox.Text = value
        End Set
    End Property

    Protected Overrides Sub SetBoundsCore(x As Integer, y As Integer, width As Integer, height As Integer, specified As BoundsSpecified)
        MyBase.SetBoundsCore(x, y, Math.Max(myWidth, myWidth + myHeight), myGirl, specified)
    End Sub
End Class

        Dim LookUpCol As New DataGridViewTextButtonColumn() With {.ValueType = GetType(String),
                                                                .HeaderText = If(curLang = "TH, "รหัส", "Code"),
                                                                .Width = 130,
                                                                .ButtonClickHandler = Sub(s1, e1)
                                                                                          dgvIncAMT.EndEdit()
                                                                                          Dim keyValue As String = dgvIncAMT.CurrentRow.Cells(curColIndex).Value
                                                                                          Dim lstSearch = lstMSTData.FindAll(Function(c) c.TABTYPE = "INC" AndAlso c.TABCODE = "หอยสองรู").ToList()
                                                                                          Dim strRetValue As String = mduControlManager.GetModPenTabSearch("ข้อมูล รายได้", {"TABCODE", "DESC", "SDESC", ""}, If(String.IsNullOrEmpty(keyValue), String.Empty, keyValue), "Model.MSTData", "BLL.MSTData", lstSearch)
                                                                                          If Not String.IsNullOrEmpty(strRetValue) Then
                                                                                              Dim strArray() = strRetValue.Split(StringManager.InfoSPC)
                                                                                              e1.Text = strArray(0)
                                                                                              dgvIncAMT.CurrentRow.Cells(2).Value = strArray(1)
                                                                                              e1.Handled = True
                                                                                          End If
                                                                                      End Sub
                                                                }
        dgvIncAMT.Columns.Insert(0, LookUpCol)

Private Sub dgvIncAMT_EditingControlShowing(sender As Object, e As DataGridViewEditingControlShowingEventArgs) Handles dgvIncAMT.EditingControlShowing
    If dgvIncAMT.CurrentCell.ColumnIndex = 3 Then
        Dim txtedit As TextBox = DirectCast(e.Control, TextBox)
        RemoveHandler txtedit.KeyPress, AddressOf txtEdit_KeyPress
        AddHandler txtedit.KeyPress, AddressOf txtEdit_KeyPress
    End If
End Sub

Private Sub txtEdit_KeyPress(ByVal sender As Object, ByVal e As KeyPressEventArgs)
    If dgvIncAMT.CurrentCell.ColumnIndex = 3 Then
        Dim txt As TextBox = DirectCast(sender, TextBox)
        If e.KeyChar < "0" OrElse e.KeyChar > "9" Then
            If AscW(e.KeyChar) = Keys.Back Then
                e.Handled = False
            Else
                If e.KeyChar = "." And txt.Text.Contains(".") = False Then
                    e.Handled = False
                ElseIf e.KeyChar = "-" And txt.Text.Contains("-") = False Then
                    e.Handled = False
                Else
                    e.Handled = True
                End If
            End If
        End If
    End If
End Sub

cboSmallItems.DataSource = New System.Collections.Specialized.HybridDictionary() From {{"01", "หอย"}, {"02", "งาม"}, {"03", "มาก"}}
cboSmallItems.DisplayMember = "Value"
cboSmallItems.ValueMember = "Key"

cboSmallItems.DataSource = New System.Collections.Specialized.HybridDictionary() From {{"01", "หอย"}, {"02", "งาม"}, {"03", "มาก"}}
cboSmallItems.DisplayMember = "Value"
cboSmallItems.ValueMember = "Key"

cboSmallItems.DisplayMember = "Value"
cboSmallItems.ValueMember = "Key"
cboSmallItems.DataSource = New System.Collections.Specialized.HybridDictionary() From {{"01", "หอย"}, {"02", "งาม"}, {"03", "มาก"}}

RemoveHandler cboSmallItems.SelectedIndexChanged, AddressOf cboSmallItems_SelectedIndexChanged
cboSmallItems.DataSource = New System.Collections.Specialized.HybridDictionary() From {{"01", "หอย"}, {"02", "งาม"}, {"03", "มาก"}}
cboSmallItems.DisplayMember = "Value"
cboSmallItems.ValueMember = "Key"
AddHandler cboSmallItems.SelectedIndexChanged, AddressOf cboSmallItems_SelectedIndexChanged

Private Sub cboSmallItems_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboSmallItems.SelectedIndexChanged

End Sub